SINCE 1828
ethinyl estradiol
nounDefinition of ethinyl estradiol
: a very potent synthetic estrogen C20H24O2 used especially as an oral contraceptive
Examples of ethinyl estradiol in a Sentence
Recent Examples on the Web
Taytulla, also called ethinyl estradiol, gained Food and Drug Administration approval in 2013. — Austen Hufford, WSJ, "Allergan Recalls Taytulla Birth-Control Packs After Pills Placed Out of Order," 29 May 2018 Tyler’s experiments looked at one type of synthetic estrogen: ethinyl estradiol, or EE2, which is found in oral contraceptives like TriNessa and Seasonique. — Becky Little, Smithsonian, "How One Bad Science Headline Can Echo Across the Internet," 31 July 2017 One environmental estrogen is ethinyl estradiol—a chemical found in birth control pills. — National Geographic, "Why Are These Male Fish Growing Eggs?," 3 Feb. 2016These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ethinyl estradiol.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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More Definitions for ethinyl estradiol
ethinyl estradiol
noun
variants:
or ethynylestradiol \ ˌeth-ə-nil-ˌes-trə-ˈdī-ˌȯl 
, -ˌōl
\
or chiefly British ethinyloestradiol
or ethynyloestradiol \ ˌeth-ə-nil-ˌē-strə-ˈdī-ˌȯl
, -ē-ˈstrad-ē-ˌȯl
, -ˌōl \
, -ˌōl
\
or chiefly British ethinyloestradiol
or ethynyloestradiol \ ˌeth-ə-nil-ˌē-strə-ˈdī-ˌȯl
, -ē-ˈstrad-ē-ˌȯl
, -ˌōl \
Medical Definition of ethinyl estradiol
: a white crystalline very potent synthetic estrogen C20H24O2 prepared from estrone and used in combination (as with norgestrel or norethindrone) as a birth control pill or alone in the treatment of menopausal symptoms or female hypogonadism or in the palliative treatment of prostate or breast cancer — see loestrin, minastrin, nuvaring, ortho evra, ortho-novum, ortho tri-cyclen, seasonale, seasonique, yasmin, yaz
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